Audacity is a good and free way to go! You can also pick up cheap copies of Cubase, Ableton Live LE (think thats what they call it, some light version), or Sonar. Keep in mind that Reason is a different beast than the other DAW (digital audio workstations) you mention. Reason loads by itself and does not offer typical audio recording or editing. Its great for producing music, doing beats, etc.., I also do not think you can load VSTs into Reason yet, so thats something to consider as well. That said, it can be used via ReWire (which is another topic to cover).
Guess the best question is.. what are you lookig to do? Recording live instruments? Are you using virtual instruments only and loops/samples, etc..?
So whats up? Let us know a bit more about what you are doing!